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【題目】 Clearly there is much to be desired _____ it comes to the quality of teachers and their teaching methods.

A. when B. since C. until D. although

【答案】A

【解析】

試題分析： 考查連詞辨析。句意：在提到教師的素質(zhì)和教學(xué)方法上，還有很久的路要走。When it comes to 當(dāng)提到。。，故選A項。

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